/*
 * Copyright (C) 2008 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.zxing.client.android;

import java.io.IOException;
import java.util.Collection;
import java.util.Map;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.KeyEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.view.View.OnClickListener;

import com.afd.ozblip.activity.R;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.DecodeHintType;
import com.google.zxing.Result;
import com.google.zxing.ResultPoint;
import com.google.zxing.client.android.camera.CameraManager;

/**
 * This activity opens the camera and does the actual scanning on a background
 * thread. It draws a viewfinder to help the user place the barcode correctly,
 * shows feedback as the image processing is happening, and then overlays the
 * results when a scan is successful.
 * 
 * @author dswitkin@google.com (Daniel Switkin)
 * @author Sean Owen
 */
public final class CaptureCodeActivity extends Activity implements
		SurfaceHolder.Callback {

	private static final String TAG = CaptureCodeActivity.class.getSimpleName();

	public static final String RESULT_KEY_TEXT = "RESULT_KEY_TEXT";

	// private static final long DEFAULT_INTENT_RESULT_DURATION_MS = 1500L;

	// public static final int HISTORY_REQUEST_CODE = 0x0000bacc;

	// private static final Set<ResultMetadataType> DISPLAYABLE_METADATA_TYPES =
	// EnumSet
	// .of(ResultMetadataType.ISSUE_NUMBER,
	// ResultMetadataType.SUGGESTED_PRICE,
	// ResultMetadataType.ERROR_CORRECTION_LEVEL,
	// ResultMetadataType.POSSIBLE_COUNTRY);

	private CameraManager cameraManager;
	private CaptureCodeActivityHandler handler;
	private Result savedResultToShow;
	private ViewfinderView viewfinderView;
	// private TextView statusView;
	// private View resultView;
	@SuppressWarnings("unused")
	private Result lastResult;
	private boolean hasSurface;
	private IntentSource source;
	private Collection<BarcodeFormat> decodeFormats;
	private Map<DecodeHintType, ?> decodeHints;
	private String characterSet;
	private InactivityTimer inactivityTimer;
	private BeepManager beepManager;
	private AmbientLightManager ambientLightManager;

	ViewfinderView getViewfinderView() {
		return viewfinderView;
	}

	public Handler getHandler() {
		return handler;
	}

	CameraManager getCameraManager() {
		return cameraManager;
	}

	@Override
	public void onCreate(Bundle icicle) {
		super.onCreate(icicle);

		Window window = getWindow();
		window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
		setContentView(R.layout.activity_capture_code);

		hasSurface = false;
		inactivityTimer = new InactivityTimer(this);
		beepManager = new BeepManager(this);
		ambientLightManager = new AmbientLightManager(this);

		// 返回
		findViewById(R.id.ll_common_left).setOnClickListener(
				new OnClickListener() {
					@Override
					public void onClick(View v) {
						finish();
					}
				});
	}

	@SuppressWarnings("deprecation")
	@Override
	protected void onResume() {
		super.onResume();

		// CameraManager must be initialized here, not in onCreate(). This is
		// necessary because we don't
		// want to open the camera driver and measure the screen size if we're
		// going to show the help on
		// first launch. That led to bugs where the scanning rectangle was the
		// wrong size and partially
		// off screen.
		cameraManager = new CameraManager(getApplication());

		viewfinderView = (ViewfinderView) findViewById(R.id.viewfinder_view);
		viewfinderView.setCameraManager(cameraManager);

		// resultView = findViewById(R.id.result_view);
		// statusView = (TextView) findViewById(R.id.status_view);

		handler = null;
		lastResult = null;

		resetStatusView();

		SurfaceView surfaceView = (SurfaceView) findViewById(R.id.preview_view);
		SurfaceHolder surfaceHolder = surfaceView.getHolder();
		if (hasSurface) {
			// The activity was paused but not stopped, so the surface still
			// exists. Therefore
			// surfaceCreated() won't be called, so init the camera here.
			initCamera(surfaceHolder);
		} else {
			// Install the callback and wait for surfaceCreated() to init the
			// camera.
			surfaceHolder.addCallback(this);
			surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
		}

		beepManager.updatePrefs();
		ambientLightManager.start(cameraManager);

		inactivityTimer.onResume();

		Intent intent = getIntent();

		source = IntentSource.NONE;
		decodeFormats = null;
		characterSet = null;

		if (intent != null) {
			String action = intent.getAction();

			if (Intents.Scan.ACTION.equals(action)) {

				// Scan the formats the intent requested, and return the result
				// to the calling activity.
				source = IntentSource.NATIVE_APP_INTENT;
				decodeFormats = DecodeFormatManager.parseDecodeFormats(intent);
				decodeHints = DecodeHintManager.parseDecodeHints(intent);

				if (intent.hasExtra(Intents.Scan.WIDTH)
						&& intent.hasExtra(Intents.Scan.HEIGHT)) {
					int width = intent.getIntExtra(Intents.Scan.WIDTH, 0);
					int height = intent.getIntExtra(Intents.Scan.HEIGHT, 0);
					if (width > 0 && height > 0) {
						cameraManager.setManualFramingRect(width, height);
					}
				}

				String customPromptMessage = intent
						.getStringExtra(Intents.Scan.PROMPT_MESSAGE);
				if (customPromptMessage != null) {
					// statusView.setText(customPromptMessage);
				}

			}

			characterSet = intent.getStringExtra(Intents.Scan.CHARACTER_SET);
		}
	}

	@Override
	protected void onPause() {
		if (handler != null) {
			handler.quitSynchronously();
			handler = null;
		}
		inactivityTimer.onPause();
		ambientLightManager.stop();
		cameraManager.closeDriver();
		if (!hasSurface) {
			SurfaceView surfaceView = (SurfaceView) findViewById(R.id.preview_view);
			SurfaceHolder surfaceHolder = surfaceView.getHolder();
			surfaceHolder.removeCallback(this);
		}
		super.onPause();
	}

	@Override
	protected void onDestroy() {
		inactivityTimer.shutdown();
		super.onDestroy();
	}

	@Override
	public boolean onKeyDown(int keyCode, KeyEvent event) {
		switch (keyCode) {
		// case KeyEvent.KEYCODE_BACK:
		// if (source == IntentSource.NATIVE_APP_INTENT) {
		// setResult(RESULT_CANCELED);
		// finish();
		// return true;
		// }
		// if (source == IntentSource.NONE && lastResult != null) {
		// restartPreviewAfterDelay(0L);
		// return true;
		// }
		// break;
		case KeyEvent.KEYCODE_FOCUS:
		case KeyEvent.KEYCODE_CAMERA:
			// Handle these events so they don't launch the Camera app
			return true;
			// Use volume up/down to turn on light
		case KeyEvent.KEYCODE_VOLUME_DOWN:
			cameraManager.setTorch(false);
			return true;
		case KeyEvent.KEYCODE_VOLUME_UP:
			cameraManager.setTorch(true);
			return true;
		}
		return super.onKeyDown(keyCode, event);
	}

	// @Override
	// public boolean onCreateOptionsMenu(Menu menu) {
	// MenuInflater menuInflater = getMenuInflater();
	// menuInflater.inflate(R.menu.capture, menu);
	// return super.onCreateOptionsMenu(menu);
	// }

	// @Override
	// public void onActivityResult(int requestCode, int resultCode, Intent
	// intent) {
	// if (resultCode == RESULT_OK) {
	// if (requestCode == HISTORY_REQUEST_CODE) {
	// int itemNumber = intent.getIntExtra(
	// Intents.History.ITEM_NUMBER, -1);
	// if (itemNumber >= 0) {
	// }
	// }
	// }
	// }

	private void decodeOrStoreSavedBitmap(Bitmap bitmap, Result result) {
		// Bitmap isn't used yet -- will be used soon
		if (handler == null) {
			savedResultToShow = result;
		} else {
			if (result != null) {
				savedResultToShow = result;
			}
			if (savedResultToShow != null) {
				Message message = Message.obtain(handler,
						R.id.decode_succeeded, savedResultToShow);
				handler.sendMessage(message);
			}
			savedResultToShow = null;
		}
	}

	@Override
	public void surfaceCreated(SurfaceHolder holder) {
		if (holder == null) {
			Log.e(TAG,
					"*** WARNING *** surfaceCreated() gave us a null surface!");
		}
		if (!hasSurface) {
			hasSurface = true;
			initCamera(holder);
		}
	}

	@Override
	public void surfaceDestroyed(SurfaceHolder holder) {
		hasSurface = false;
	}

	@Override
	public void surfaceChanged(SurfaceHolder holder, int format, int width,
			int height) {

	}

	/**
	 * A valid barcode has been found, so give an indication of success and show
	 * the results.
	 * 
	 * @param rawResult
	 *            The contents of the barcode.
	 * @param scaleFactor
	 *            amount by which thumbnail was scaled
	 * @param barcode
	 *            A greyscale bitmap of the camera data which was decoded.
	 */
	public void handleDecode(Result rawResult, Bitmap barcode, float scaleFactor) {
		if (rawResult == null || rawResult.getText() == null) {
			return;
		}

		inactivityTimer.onActivity();
		lastResult = rawResult;
		// ResultHandler resultHandler = ResultHandlerFactory.makeResultHandler(
		// this, rawResult);

		boolean fromLiveScan = barcode != null;
		if (fromLiveScan) {
			// Then not from history, so beep/vibrate and we have an image to
			// draw on
			// beepManager.playBeepSoundAndVibrate();
			drawResultPoints(barcode, scaleFactor, rawResult);
		}

		switch (source) {
		case NATIVE_APP_INTENT:
			// handleDecodeExternally(rawResult, resultHandler, barcode);
			break;
		case NONE:
			handleDecodeInternally(rawResult);
			break;
		}
	}

	private void handleDecodeInternally(Result rawResult) {
		viewfinderView.setVisibility(View.GONE);

		// ToastUtils.showPromptAlertShort(this, rawResult.getText());

		final Intent intent = new Intent();
		intent.putExtra(RESULT_KEY_TEXT, rawResult.getText());
		setResult(RESULT_OK, intent);
		finish();
	}

	/**
	 * Superimpose a line for 1D or dots for 2D to highlight the key features of
	 * the barcode.
	 * 
	 * @param barcode
	 *            A bitmap of the captured image.
	 * @param scaleFactor
	 *            amount by which thumbnail was scaled
	 * @param rawResult
	 *            The decoded results which contains the points to draw.
	 */
	private void drawResultPoints(Bitmap barcode, float scaleFactor,
			Result rawResult) {
		ResultPoint[] points = rawResult.getResultPoints();
		if (points != null && points.length > 0) {
			Canvas canvas = new Canvas(barcode);
			Paint paint = new Paint();
			paint.setColor(getResources().getColor(R.color.result_points));
			if (points.length == 2) {
				paint.setStrokeWidth(4.0f);
				drawLine(canvas, paint, points[0], points[1], scaleFactor);
			} else if (points.length == 4
					&& (rawResult.getBarcodeFormat() == BarcodeFormat.UPC_A || rawResult
							.getBarcodeFormat() == BarcodeFormat.EAN_13)) {
				// Hacky special case -- draw two lines, for the barcode and
				// metadata
				drawLine(canvas, paint, points[0], points[1], scaleFactor);
				drawLine(canvas, paint, points[2], points[3], scaleFactor);
			} else {
				paint.setStrokeWidth(10.0f);
				for (ResultPoint point : points) {
					if (point != null) {
						canvas.drawPoint(scaleFactor * point.getX(),
								scaleFactor * point.getY(), paint);
					}
				}
			}
		}
	}

	private static void drawLine(Canvas canvas, Paint paint, ResultPoint a,
			ResultPoint b, float scaleFactor) {
		if (a != null && b != null) {
			canvas.drawLine(scaleFactor * a.getX(), scaleFactor * a.getY(),
					scaleFactor * b.getX(), scaleFactor * b.getY(), paint);
		}
	}

	// Put up our own UI for how to handle the decoded contents.
	// private void handleDecodeInternally(Result rawResult,
	// ResultHandler resultHandler, Bitmap barcode) {
	// statusView.setVisibility(View.GONE);
	// viewfinderView.setVisibility(View.GONE);
	// resultView.setVisibility(View.VISIBLE);
	//
	// ImageView barcodeImageView = (ImageView)
	// findViewById(R.id.barcode_image_view);
	// if (barcode == null) {
	// barcodeImageView.setImageBitmap(BitmapFactory.decodeResource(
	// getResources(), R.drawable.launcher_icon));
	// } else {
	// barcodeImageView.setImageBitmap(barcode);
	// }
	//
	// TextView formatTextView = (TextView) findViewById(R.id.format_text_view);
	// formatTextView.setText(rawResult.getBarcodeFormat().toString());
	//
	// TextView typeTextView = (TextView) findViewById(R.id.type_text_view);
	// typeTextView.setText(resultHandler.getType().toString());
	//
	// DateFormat formatter = DateFormat.getDateTimeInstance(DateFormat.SHORT,
	// DateFormat.SHORT);
	// String formattedTime = formatter.format(new Date(rawResult
	// .getTimestamp()));
	// TextView timeTextView = (TextView) findViewById(R.id.time_text_view);
	// timeTextView.setText(formattedTime);
	//
	// TextView metaTextView = (TextView) findViewById(R.id.meta_text_view);
	// View metaTextViewLabel = findViewById(R.id.meta_text_view_label);
	// metaTextView.setVisibility(View.GONE);
	// metaTextViewLabel.setVisibility(View.GONE);
	// Map<ResultMetadataType, Object> metadata = rawResult
	// .getResultMetadata();
	// if (metadata != null) {
	// StringBuilder metadataText = new StringBuilder(20);
	// for (Map.Entry<ResultMetadataType, Object> entry : metadata
	// .entrySet()) {
	// if (DISPLAYABLE_METADATA_TYPES.contains(entry.getKey())) {
	// metadataText.append(entry.getValue()).append('\n');
	// }
	// }
	// if (metadataText.length() > 0) {
	// metadataText.setLength(metadataText.length() - 1);
	// metaTextView.setText(metadataText);
	// metaTextView.setVisibility(View.VISIBLE);
	// metaTextViewLabel.setVisibility(View.VISIBLE);
	// }
	// }
	//
	// TextView contentsTextView = (TextView)
	// findViewById(R.id.contents_text_view);
	// CharSequence displayContents = resultHandler.getDisplayContents();
	// contentsTextView.setText(displayContents);
	// // Crudely scale betweeen 22 and 32 -- bigger font for shorter text
	// int scaledSize = Math.max(22, 32 - displayContents.length() / 4);
	// contentsTextView.setTextSize(TypedValue.COMPLEX_UNIT_SP, scaledSize);
	//
	// TextView supplementTextView = (TextView)
	// findViewById(R.id.contents_supplement_text_view);
	// supplementTextView.setText("");
	// supplementTextView.setOnClickListener(null);
	// // if (PreferenceManager.getDefaultSharedPreferences(this).getBoolean(
	// // PreferencesActivity.KEY_SUPPLEMENTAL, true)) {
	// // SupplementalInfoRetriever.maybeInvokeRetrieval(supplementTextView,
	// // resultHandler.getResult(),
	// // historyManager,
	// // this);
	// // }
	//
	// int buttonCount = resultHandler.getButtonCount();
	// ViewGroup buttonView = (ViewGroup) findViewById(R.id.result_button_view);
	// buttonView.requestFocus();
	// for (int x = 0; x < ResultHandler.MAX_BUTTON_COUNT; x++) {
	// TextView button = (TextView) buttonView.getChildAt(x);
	// if (x < buttonCount) {
	// button.setVisibility(View.VISIBLE);
	// button.setText(resultHandler.getButtonText(x));
	// // button.setOnClickListener(new
	// // ResultButtonListener(resultHandler, x));
	// } else {
	// button.setVisibility(View.GONE);
	// }
	// }
	// }

	// Briefly show the contents of the barcode, then handle the result outside
	// Barcode Scanner.
	// private void handleDecodeExternally(Result rawResult,
	// ResultHandler resultHandler, Bitmap barcode) {
	//
	// if (barcode != null) {
	// viewfinderView.drawResultBitmap(barcode);
	// }
	//
	// long resultDurationMS;
	// if (getIntent() == null) {
	// resultDurationMS = DEFAULT_INTENT_RESULT_DURATION_MS;
	// } else {
	// resultDurationMS = getIntent().getLongExtra(
	// Intents.Scan.RESULT_DISPLAY_DURATION_MS,
	// DEFAULT_INTENT_RESULT_DURATION_MS);
	// }
	//
	// if (resultDurationMS > 0) {
	// String rawResultString = String.valueOf(rawResult);
	// if (rawResultString.length() > 32) {
	// rawResultString = rawResultString.substring(0, 32) + " ...";
	// }
	// statusView.setText(getString(resultHandler.getDisplayTitle())
	// + " : " + rawResultString);
	// }
	//
	// if (source == IntentSource.NATIVE_APP_INTENT) {
	// // Hand back whatever action they requested - this can be changed to
	// // Intents.Scan.ACTION when
	// // the deprecated intent is retired.
	// Intent intent = new Intent(getIntent().getAction());
	// intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
	// intent.putExtra(Intents.Scan.RESULT, rawResult.toString());
	// intent.putExtra(Intents.Scan.RESULT_FORMAT, rawResult
	// .getBarcodeFormat().toString());
	// byte[] rawBytes = rawResult.getRawBytes();
	// if (rawBytes != null && rawBytes.length > 0) {
	// intent.putExtra(Intents.Scan.RESULT_BYTES, rawBytes);
	// }
	// Map<ResultMetadataType, ?> metadata = rawResult.getResultMetadata();
	// if (metadata != null) {
	// if (metadata.containsKey(ResultMetadataType.UPC_EAN_EXTENSION)) {
	// intent.putExtra(Intents.Scan.RESULT_UPC_EAN_EXTENSION,
	// metadata.get(ResultMetadataType.UPC_EAN_EXTENSION)
	// .toString());
	// }
	// Integer orientation = (Integer) metadata
	// .get(ResultMetadataType.ORIENTATION);
	// if (orientation != null) {
	// intent.putExtra(Intents.Scan.RESULT_ORIENTATION,
	// orientation.intValue());
	// }
	// String ecLevel = (String) metadata
	// .get(ResultMetadataType.ERROR_CORRECTION_LEVEL);
	// if (ecLevel != null) {
	// intent.putExtra(Intents.Scan.RESULT_ERROR_CORRECTION_LEVEL,
	// ecLevel);
	// }
	// @SuppressWarnings("unchecked")
	// Iterable<byte[]> byteSegments = (Iterable<byte[]>) metadata
	// .get(ResultMetadataType.BYTE_SEGMENTS);
	// if (byteSegments != null) {
	// int i = 0;
	// for (byte[] byteSegment : byteSegments) {
	// intent.putExtra(
	// Intents.Scan.RESULT_BYTE_SEGMENTS_PREFIX + i,
	// byteSegment);
	// i++;
	// }
	// }
	// }
	// sendReplyMessage(R.id.return_scan_result, intent, resultDurationMS);
	// }
	// }

	// private void sendReplyMessage(int id, Object arg, long delayMS) {
	// if (handler != null) {
	// Message message = Message.obtain(handler, id, arg);
	// if (delayMS > 0L) {
	// handler.sendMessageDelayed(message, delayMS);
	// } else {
	// handler.sendMessage(message);
	// }
	// }
	// }

	private void initCamera(SurfaceHolder surfaceHolder) {
		if (surfaceHolder == null) {
			throw new IllegalStateException("No SurfaceHolder provided");
		}
		if (cameraManager.isOpen()) {
			Log.w(TAG,
					"initCamera() while already open -- late SurfaceView callback?");
			return;
		}
		try {
			cameraManager.openDriver(surfaceHolder);
			// Creating the handler starts the preview, which can also throw a
			// RuntimeException.
			if (handler == null) {
				handler = new CaptureCodeActivityHandler(this, decodeFormats,
						decodeHints, characterSet, cameraManager);
			}
			decodeOrStoreSavedBitmap(null, null);
		} catch (IOException ioe) {
			Log.w(TAG, ioe);
			displayFrameworkBugMessageAndExit();
		} catch (RuntimeException e) {
			// Barcode Scanner has seen crashes in the wild of this variety:
			// java.?lang.?RuntimeException: Fail to connect to camera service
			Log.w(TAG, "Unexpected error initializing camera", e);
			displayFrameworkBugMessageAndExit();
		}
	}

	private void displayFrameworkBugMessageAndExit() {
		AlertDialog.Builder builder = new AlertDialog.Builder(this);
		builder.setTitle(getString(R.string.app_name));
		builder.setMessage(getString(R.string.msg_camera_framework_bug));
		builder.setPositiveButton(R.string.button_ok, new FinishListener(this));
		builder.setOnCancelListener(new FinishListener(this));
		builder.show();
	}

	public void restartPreviewAfterDelay(long delayMS) {
		if (handler != null) {
			handler.sendEmptyMessageDelayed(R.id.restart_preview, delayMS);
		}
		resetStatusView();
	}

	private void resetStatusView() {
		// resultView.setVisibility(View.GONE);
		// statusView.setText(R.string.msg_default_status);
		// statusView.setVisibility(View.VISIBLE);
		viewfinderView.setVisibility(View.VISIBLE);
		lastResult = null;
	}

	public void drawViewfinder() {
		viewfinderView.drawViewfinder();
	}
}
